diff --git a/zuul.d/base.yaml b/zuul.d/base.yaml
index 1235c3308..787786328 100644
--- a/zuul.d/base.yaml
+++ b/zuul.d/base.yaml
@@ -175,6 +175,7 @@
     nodeset: centos-7
     vars:
       nodepool_type: centos7
+      puppet_gem_version: 5.5
 
 - job:
     name: puppet-openstack-beaker-ubuntu-bionic
diff --git a/zuul.d/beaker.yaml b/zuul.d/beaker.yaml
index 1e429314d..6c15ac0d1 100644
--- a/zuul.d/beaker.yaml
+++ b/zuul.d/beaker.yaml
@@ -29,6 +29,7 @@
       - ^.gitignore$
     vars:
       nodepool_type: centos7
+      puppet_gem_version: 5.5
 
 - job:
     name: puppet-openstack-libraries-puppet-beaker-rspec-ubuntu-bionic